Hydraulic hoist



1937. P. R. HASSON ET AL. HYDRAULIC HOIST I Filed Aug. 16, 1935 3 Sheets-$heet l WORN/M CHUA TE STORE X By FTTdRA/E'Y Nam 23, 11937. 7 P. R. HASSON ET AL 2,099,886

HYDRAULIC HOIST Filed Aug. 16, 1955 3 Sheets-Sheet 3 g1? i x. g; I //v/ /1 70A s. m a I Pnul. Ruoouw HAsso/v. "IIIIIIIIIII/ Woman! (710/; TE STORE Y. B) 3 2,

Patented Nov. 23, 1937 UNITED STATES PATENT OFFICE HYDRAULIC HOIST Paul Rudolph Hasson and Norman Choate Storey, Leeds, England Application August-16, 1935, Serial No. 36,598

16 Claims. ((31. 97-50) This invention relates to hydraulic hoisting ported in the gear case by ball bearings 25. On mechanism for soil working implements of motor the splined end of the clutch sleeve 28 is mounted driven tractors, and has for its object to provide the female Portion 26 Of a Clutch Which female improved mechanism set in action at will by the portion can be moved through Clutch Operating driver of the tractor whereby the soil working asg he after de i to engage t t e ale sembly of the tractor and thereby the tilling imp 0f e Clutch Which is keyed s d o plements can be hoisted out of working contact the pump driving Shaft 21 The Operating gear with the soil or be lowered into the working posifor en a ing or disenga the clutch Consists tion as may be required. of a clutch strap 28 which is made in halves and The annexed drawings illustrate an examp1e of bolted together to facilitate fitting t0 the female 10 const u ti of th in entio portion 26 of the clutch. To the bottom half of Fig. l is a vertical longitudinal section of the the clutch strap 28 is fitted a lever 29 and to the power transmitting mechanism and the casing op a f a lever Both levers 29 and 33 are therefor. fixed to spindle 3 I. Lever 30 is in the form of a Fig. 2 i section on 1in A- -A of Fig, 1, bell crank, one crank being fixed to the clutch 15 Fig. 3 is a section on line B-B of Fig. 1 seen in strap and the other crank to connecting link 32 by the direction of the o s joint pin 33. Connecting link 32 is coupled to the Fig. 4 is a section on line c c of Fig. 1 seen in Operating v r 34 y int p n 35 the other end the direction of th ar of the operating lever fitting over the lower end Fig. 5 is an elevation of a tractor showing the 0f the Operating Spindle Oh to the pp 20 casing containing the hoisting mechanism atend of spindle 36 s fi d operating lever 31 Fi 6 tached to the forward end of the tract which is connected to the hand operating lever Fig. 6 is a plan view of Fig. 5. 38 y red e h t haft 0 (Fig. 1) on to I indicates the gear box or casing enclosing Which is keyed e pinion 4! engaging with the the power transmitting mechanism, this gearrack 42 Fig. 4 secur to the piston block 43, is 25 box being fixed in any suitable manner at the forar i d in bearings 44, 45 and and as heistward end of the tractor as diagrammatically g Chain d u keyed On to its ends. Conshown in Fig. 5. 2 indicates a vertical cylinder heeted t0 a arranged to W d 011 to the Chain of the gear-box and 3 a base chamber of the drums 4'! are hoisting chai s 8 gs. 5 and 6) gear-box. 4 is the forward end of the tractors pa v pulleys 49 and Connected y the 30 crankshaft, 5 is th tractors timi gear hi h frames 50 provided with rods 50a slidable against is fixed to the coupling ring 6 by bolts 1. The spring u s to the fi n impl ment asdriving shaft 8 of the hoisting mechanism is sembly 64 which i h n d to the rear of the tracdriven from the tractor crankshaft 4 through tor at St. The pulleys 49 are carried on a shaft the coupling ring 6 a part of which is the driving 52 mounted in bearings 53 and 5 Meu 011 35 dental clutch I0 for driving said shaft 8 which is the front of the tractor is the gear-box I, with its on the same axial centre line as the shaft 4. Cylinder 2 containing the hydraulic piston block The shaft 8 is carried at its forward end in a ball 43. Leading to t p o the Cylinder 2 iS a p p bearing l3 and is there provided with a spiral 55 which carries the oil or other liquid delivered pinion H keyed thereto by key I! and. with a y p p 23 t0 the aulic cylinder. Con- 40 clutch member I2 fixed on its forward end. nected to the suction side of the pump 23 is suc- Opposite the clutch member 12 is the other tion pipe 56 the open end of which is immersed member l2a of this clutch fixed to the shaft 801. in the oil contained in the gearbox base 3. Fixed of the starting handle I21) of the tractor motor. to the lower end of operating spindle 35 is a lever The gear case I which encloses the power .51 in the end of which is fixed a set screw 58 45 transmitting mechanism of the hoist is held censo as to engagewith the release valve 59 when tral with the shaft 8 by fitting over housing E4 the hand operating lever 38 is moved to the lower which acts as a spigot, this gear case I being position. The oil in the cylinder 2 is then resupported and carried directly in front of the turned to the gearbox through the release valve tractors radiator 65 (Fig. 5) by side plates 15 and 59 as the piston block 43 returns to the top of bolts 16 (Fig. 2). The spiral pinion II keyed on the cylinder. Fitted into bracket 60 cast integral to the driving shaft 8 drives a spiral Wheel IS with the gear box base 3 is spindle 61 .on the keyed to clutch sleeve 20 by key 2|. The clutch ends of which is fixed knock ofi levers 62 and B3. sleeve 2|] is rotarily mounted on the driving shaft When the piston 43 is almost at the bottom of its 22 of the oil pump 23 by bush 24 and is supstroke it strikes lever 62 and actuates lever 63 '55 through spindle 5!. Lever 63 is then moved to such a position as to push lever 29 and thus throw the clutch out of action when the implements have'been hoisted to the proper height.

It is now obvious that' while the .motor is running, the clutch sleeve 20 is also in motion being driventhrough shaft 8 and gears II and [9. When it is desired to lift the implements 6 4 at the rear of the tractor, the hand lever 38 is raised and thus through intermediate levers and connections the shifter lever yoke 29 is moved thereby bringing the rotating female clutch member 26 into contact with the stationary male clutch member 21'. The clutch member 21 being keyed to the pump shaft 22 drives this shaft and thus oil is drawn from the gearbox base 3 through pipe 56 to the pump 23, and from the pump is delivered through pipe55 into cylinder '2 and on to the head of the piston 43. the oil forces the piston 43 down the cylinder "2 and the toothed rack 42 rotates the hoistingdrums 41 through-pinion 4i and shaft 40. To lower the implements, the hand lever 38 is pushed downwards which action moves the set screw 58 into contact with the release valve 59, as previously explained, the pressure in the cylinder is thus released and the oil is returned to the gearbox through pipe 55and valve 59 The gearbox I which houses the clutch and gearing is partly filled withoil so that all important rapidly moving parts work in a bath of oil.

What we claimas our invention and desire to secure by Letters Patent of the United States 1.'In' a motor driven tractor, a soil working implement assembly adapted to be raised and lowered, arranged at the rear end thereof, a rotary member, means connecting said assembly to said member for lifting said assembly upon rotation of 7 .said member, hydraulic mechanism including a piston-driven rack and a pinion on the rotary member for rotating said member, a clutch-controlled pump for setting said hydraulic mechanism in action from the motor of the tractor to raise said assembly, when required, and means for lowering said assembly through said hydraulic mechanism when required. a

'2.- In a motor driven tractor, a soil working implement assembly adapted to be raised ,and

action said hydraulic mechanism from the front end of the motor of the tractor, rotary hoisting means connected to said assembly, meansoperated by said hydraulic mechanism for rotating said hoisting means, and means for loweringsaid assembly through said hydraulic mechanism and said hoisting means. I q 3. In a motor driven tractor, a soil working implement assembly adapted to be raised'and lowered, arranged at the rear end thereof, a clutch-controlled pump means for supplying ,liquid thereto, means for driving said pump, a

cylinder, a hydraulic piston within said cylinder,

7 means for the delivery of liquid from said pump to said cylinder to operate said piston, a rotary drum,

means connected-to said assembly and adapted to be wound on said drum, a rack actuated by 'saidpiston, apinion driven by said rack for rotating said drum to raise said assembly, and means f r p m ing the return ofthe liquid from The pressure of r said cylinder to said pump and thereby a reverse movement of said piston to lower said assembly.

4. In a motor driven tractor, asoil working implement assembly adapted to be raised and lowered, arranged at the rear end thereof, a clutch-controlled pump, means for supplying liquid thereto, means for driving said pump, a cylinder, a hydraulic piston within said cylinder, means for the delivery of liquid from said pump to said cylinder to operate said piston, rotary hoisting means connected to said assembly, a rack actuated by said piston, a pinion driven by said rack for rotating said hoisting means to raise said assembly, means for promoting the return of the liquid from said cylinder to said pump and thereby a reverse movement of said piston to lower said assembly, and means operated by said piston for cutting out the action of said pump and thereby the delivery of the liquid therefrom to said cylinder when said assembly has been raised to the required height.

5. In a motor driven tractor, a soil working implement assembly adaptedto be raised and lowered; arranged at therear end thereof, a shaft, means for driving said shaft from the tractor driving motor, a pinion on said shaft, a pump having a driving spindle, a gear on said spindle meshing with said pinion, a clutch sleeve rotarily mounted on the driving spindle of said pump, one memberofa clutch mounted on said sleeve, another'member of said clutch mounted on said pump driving spindle, means for operating said clutch members to govern the action of said pump, a cylinder, a hydraulic piston therein actuated through said pump, hoisting'means for said assembly, and means for actuating said hoisting means by said piston.

6. In a motor driven tractor, a soil working implement assembly adapted to be raised and lowered, arranged atthe rear end thereof, a casing, means for supporting said casing at the forwardend of the tractor, hydraulic mechanism within said casing,'means for setting in action said hydraulic mechanism from the front end of the motor of the tractor, a cross-shaft mounted on said casing, means for actuating said crossshaft by said hydraulic mechanism, a drum on each end of said cross-shaft, chains connected to said drums and to said assembly, and guiding pulleys mounted on the tractor for said chains.

pinion on said cross-shaft gearing with said rack,

a drum on each end of said cross-shaft, chains connected to said drums and to said assembly, guiding pulleys mounted on the tractor, for said chains, and means operated by said piston for cutting out the action of said pump and thereby the delivery'of' the liquid therefrom to said cylinder when said cross-shaft and said drums thereon have been rotated by said rack and said pinion to raise saidassembly by said chains to the required height; 7 l a 8, A hydraulic hoist comprising a rotating drum shaft, a gear mounted on said shaft, a hydraulic cylinder, a slidable piston fitted in said 7 '7. In a motor driven tractor, a soil working implement assembly. adaptedto be raised and cylinder, atoothed rack mounted on said slidable piston and meshing with said gear, and means comprising a clutch-controlled oil pump to actuate said piston.

9. In a motor driven tractor, a soil working implement assembly adapted to be raised and lowered, arranged at the rear end thereof, hydraulic mechanism for hoisting said assembly, a pump for supplying liquid to said hydraulic mechanism, and a clutch operable at will for coupling said pump to the tractor motor to control the actuation of said hydraulic mechanism.

10. In a motor driven tractor, a soil working implement assembly adapted to be raised and lowered, arranged at the rear end thereof, a rotary member, means connecting said assembly to said member for lifting said assembly upon rotation of said member, hydraulic mechanism for rotating said member, a pump for supplying liquid to said hydraulic mechanism, and a clutch operable at will for coupling said pump to the tractor motor to control the actuation of said hydraulic mechanism.

11. A hoisting attachment for motor-driven vehicles, comprising a casing, a hoisting drum carried by said casing, a hydraulic cylinder, a piston in said cylinder, means actuated by said piston for rotating said drum, a pump for supplying liquid under pressure to said cylinder, a shaft in said casing driven by the motor of the vehicle, and a clutch for coupling said pump to said shaft at will to actuate said drum.

12. A hoisting attachment for motor-driven vehicles, comprising a casing, a hoisting drum carried by said casing, a hydraulic cylinder, a piston in said cylinder, means actuated by said piston for rotating said drum, 2. pump for supplying liquid under pressure to said cylinder, a shaft in said casing driven by the motor of the vehicle, a clutch for coupling said pump to said shaft at will to actuate said drum, means for operating said clutch, and a relief valve operable by the clutch-operating means for discharging liquid from the cylinder.

13. A hydraulic hoist comprising a rotatably mounted hoisting shaft, a hydraulic plunger, a rack and gear for transmitting reciprocatory motion from said plunger into rotary motion of said shaft, a manually-controlled liquid pressure pump for-controlling the hoisting movements of the hydraulic plunger, and means comprising a manually operated release valve for controlling the lowering movement of the hydraulic plunger.

14. A hydraulic implement hoist comprising rotatable winding drums, a hydraulic plunger, a rack and gear for transmitting reciprocatory motion of said plunger into rotary motion of said drums, said hoist being so constructed that the reaction of a hoisted implement on the winding drums will drive the hoisting plunger to a lowered position.

15. A hydraulic implement hoist comprising rotatable winding drums, ahydraulic plunger, a rack and gear for transmitting reciprocatory motion of said plunger into rotary motion of said drums, a manually-controlled pressure pump for driving the plunger to a hoisted position, and a manually-controlled release valve operable to release the pressure on the plunger and to allow the force from the weight of the lifted implements on the periphery of the drums to drive the plunger to its lowered position.

16. In combination with a tractor having a motor, a change speed transmission and a master clutch between the motor and transmission, a hydraulic implement hoist comprising a hydraulic plunger, a rotatably mounted hoisting shaft, a rack and gear driving connection between the plunger and shaft, hoisting means driven by the rotatably mounted shaft whereby the force of gravity on the hoisted implements is continually available for driving the hoisting mechanism to a lowered position, a direct continuous driving connection through a shaft to the forward end or" the tractors motor, a pressure pump for driving the hydraulic plunger, means comprising a manually operated clutch for controlling the hoisting movements of the hydraulic plunger, and means comprising a manually operated release valve for controlling the lowering movements of the hydraulic plunger.

PAUL RUDOLPH HASSON. NORMAN CHOATE STOREY. 

